Locking Apparatus With Deformed Threads For High Cantilever Loads

The patent applies parameter changes by specifying precise material compositions (e.g., stainless steel with minimum 10.5% chromium content, nickel-plated zinc alloy with specific element ranges) and geometric parameters (thread dimensions, cam lever arm lengths) to achieve both high strength and manufacturability. These quantified parameters enable consistent production of locks meeting 1000-pound cantilever load requirements while using standard manufacturing processes.

The patent employs composite materials strategy by combining stainless steel components (plug, cam, spring) with nickel-plated zinc alloy components (cylinder, housing) to optimize both strength and corrosion resistance. The nickel plating on zinc alloy provides enhanced corrosion protection, while the stainless steel elements provide structural strength, creating a composite construction that meets performance requirements without excessive manufacturing complexity.

The patent applies universality by designing the lock with a standardized cam interface that can be installed using common tools (nut driver, screwdriver) rather than specialized installation equipment. The cam, plug, and housing are designed with universal mounting features that accommodate standard fasteners, making installation accessible to typical consumers without requiring specialized training or tools, thereby improving ease of operation while maintaining security.

The lock incorporates self-service features including a self-lubricating cam mechanism and self-aligning plug design that reduce the need for precise manual adjustment during installation. The spring-loaded cam automatically engages with the housing features, and the plug self-centers in the cylinder, allowing consumers to install the lock themselves without professional assistance, enhancing both ease of operation and reliability.

The patent applies parameter changes by specifying minimum material composition thresholds (e.g., chromium content ≥10.5%, nickel plating thickness) that transform standard commercial materials into high-performance components. These parameter specifications ensure that commonly available stainless steel and nickel-plated zinc alloy materials meet the required corrosion resistance and strength levels, making the lock cost-effective while reliable.

The patent employs a strategy of using cost-effective, readily available materials (standard stainless steel grades, nickel-plated zinc alloy) that can be sourced from common suppliers rather than requiring expensive specialized materials. This approach maintains affordability and ease of manufacture while the specified material parameters ensure sufficient durability and corrosion resistance for the intended application lifecycle.